Respiratory Resistance Tester

The respiratory resistance tester is suitable for determining the inhalation resistance and exhalation resistance of respirators and mask protective products under specified conditions, and for the related testing and inspection of common mask products by manufacturers of national labor protection article inspection agencies.

Features of the Respiratory Resistance Tester

• The instrument consists of an air source that can adjust the flow rate, a humanhead mold specified in the standard, two intubation systems for inhalation andexhalation, and a respiratory resistance measurement system.

• The flow sensor has high sensitivity and has a very small starting flow.

• The flow sensor chip uses a thermal mass flow meter, which does not requiretemperature and pressure compensation, ensuring high-precision measurement ofthe sensor.

• Multiple sensors are integrated on a single flow sensor chip, which greatlyimproves the range ratio of the sensor.

• The zero point stability of the flow sensor is high, with full range and high stability,high accuracy over the full range, excellent repeatability, low power consumption,low pressure loss and fast response speed.

• The data logger uses a graphic dot matrix LCD with a resolution of 128 × 64, which is easy to operate. It data has 4M memory for measurement value recording.

• The micromanometer sensor uses a two-wire system, with high accuracy and good stability; it is safe and reliable to use an explosion-proof design.

• The range and zero point of the micromanometer sensor are continuously adjustable, the damping is adjustable, there is no mechanical moving part, and the maintenance workload is small.

• The whole instrument adopts special gas path conversion elements, which ensures the convenient and fast conversion of the two-pipe system of exhalation and inhalation.

• Applicable to the latest national standard requirements, compatible with labor protection protective masks and daily protective mask standards

The testing instrument meets the requirements of EN149 standard. 

EN 149 defines laboratory tests, field tests and certain requirements to ensure the conformity of the masks. The following points are analyzed:

• Packaging
• Materials: resistance to manipulation
• Practical performance test
• Leakage: total leakage inwards and penetration of the filter material

Technical Specifications

• Flowmeter range: 0 L/min～100L/min
• Flowmeter range accuracy: ±2%
• Micro-pressure measuring range: -1000Pa～1000Pa
• Micromanometer accuracy: 1Pa
• Pumping capacity of suction: Not less than 100L / min
• Ventilation Constant: (85 ± 1) L / min
• Power Supply: AC220V，50Hz

Warranty 

The Respiratory Resistance Tester comes with 1 year warranty.